Sefrioui, Zouhair y Arias, D. y González Herrera, Elvira María y León, C. y Santamaría Sánchez-Barriga, Jacobo y Vicent López, José Luis (2001) Vortex liquid entanglement in irradiated YBa_2Cu_3O_7 thin films. Physical review B, 63 (6). ISSN 1098-0121
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URL Oficial: http://dx.doi.org/10.1103/PhysRevB.63.064503
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https://journals.aps.org | Editorial |
Resumen
Epitaxial YBa_2Cu_3O_7 thin films, grown by high-pressure de sputtering, an irradiated with He^(+) ions at 80 keV with doses between 10_(14) and 10_(15) cm^(-2). Irradiation reduces the critical temperature but it does not modify the carrier concentration. Angle- dependent resistivity is used to show that the mass anisotropy does not change upon irradiation. The melting transition in magnetic fields applied parallel to the c axis is analyzed by I-V critical scaling, and all irradiated and nonirradiated samples show a three- dimensional vortex glass transition with the same critical exponents. The dissipation in the liquid state is analyzed in terms of the activation energy of the magnetoresistance in a perpendicular magnetic field. While as-grown samples show an activation energy depending as 1/H on the applied magnetic field, irradiated samples show a dependence as 1/H^(0.5), characteristic of plastic deformation of vortices. This is discussed in terms of the point disorder introduced by ion irradiation.
Tipo de documento: | Artículo |
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Información Adicional: | ©2001 The American Physical Society. |
Palabras clave: | High-temperature Superconductors; High-tc superconductors; Lattice-melting transition; Flux-line-lattice; II Superconductors; Quenched disorder; Phase-transitions; Glass-transition; Single-crystals; Elastic theory |
Materias: | Ciencias > Física > Electricidad Ciencias > Física > Electromagnetismo Ciencias > Física > Física de materiales Ciencias > Física > Física del estado sólido |
Código ID: | 43897 |
Depositado: | 22 Aug 2017 17:12 |
Última Modificación: | 10 Dic 2018 14:58 |
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